__NEWS___U.S. Wireless Enter 2,500 Site Co-location and Turnkey.

American Tower, U.S. Wireless Enter 2,500 Site Co-location and Turnkey Services Agreements as Part of Strategic Alliance

BOSTON and SAN RAMON, Calif., May 17, 2000 (BUSINESS WIRE) -- American TowerCorporation (NYSE:AMT) and U.S. Wireless Corporation (Nasdaq:NMS:USWC,Frankfurt:USP) have formed a strategic alliance to accelerate the deployment ofa wireless location network that carriers will use to provide wireless phoneusers with emergency E-911 caller location assistance and other locationenhanced services such as real-time traffic updates, navigational assistance andlocation-based directory assistance.

To establish its national location network, U.S. Wireless has signed aco-location agreement under which it will lease 2,500 American Tower sites forits planned 100-market wireless network deployment. Simultaneously, tofacilitate the network's build-out, American Tower will provide U.S. Wirelesswith nationwide turn-key network deployment services, including RF engineering,network design, site acquisition, project management, component supply and siteinstallation. American Tower has also agreed to support U.S. Wireless' marketingefforts with wireless carriers.

Separately, American Tower has agreed to invest $22.5 million in U.S. Wireless'Series C Convertible Preferred Stock. The Preferred Stock is convertible toCommon Stock at the option of American Tower at a conversion price of $19.03 pershare, subject to adjustment in certain events. Dividends on the ConvertiblePreferred Stock will be 6 1/2%, payable semi-annually, with the first threeyears either PIK (payment-in-kind) or cash pay, at U.S. Wireless' option, and

cash pay thereafter. In addition, a member of American Tower's senior managementwill join the U.S. Wireless Board of Directors. The proceeds of the investmentwill be used by U.S. Wireless to accelerate the marketing and deployment of itsnational location network platform and to fund additional development andgeneral corporate expenses.

Jim Eisenstein, Chief Development Officer of American Tower, stated, "U.S.Wireless has a winning combination of attributes--innovative technology, apromising business strategy and an excellent management team. Their uniqueRadioCamera system will help wireless carriers meet the FCC's E-911 mandate aswell as offer value-added services. We understand that quality and speed tomarket are essential to the success of U.S. Wireless' network deployment andlook forward to working with them every step of the way, from RF engineeringthrough installation to ongoing system support, to assure that these goals aremet."

Dr. Oliver Hilsenrath, Chairman and CEO of U.S. Wireless, said, "Our alliancewith American Tower, the largest tower company in the U.S., is a critical stepin our plan to provide a nationwide shared mobile location platform. AmericanTower is uniquely positioned to help us achieve our goals through its nationwidefootprint and turnkey network development services. The co-location agreementfor 2,500 tower sites establishes much of U.S. Wireless' national footprint inone broad stroke. Equally important, by outsourcing network deployment, U.S.Wireless can simultaneously build out multiple markets, while focusing on itscore competency--creating and providing high quality location information andmobile content."

About American Tower

American Tower is the leading independent owner operator and developer ofbroadcast and wireless communications sites in North America. Giving effect topending transactions, American Tower operates over 10,600 sites in the UnitedStates, Mexico and Canada, including approximately 300 broadcast tower sites. Ofthe 10,600 sites, approximately 9,400 are owned or leased towers and over 1,200are managed and lease/sublease sites. Based in Boston, American Tower hasregional hub offices in Boston, Atlanta, Chicago, Houston, San Francisco andMexico City. For more information about American Tower Corporation and ATCTeleports, please visit our web sites www.americantower.com andwww.atcteleports.com.

About U.S. Wireless

U.S. Wireless is powering the next generation of instant wireless informationservices and mobile content. Through a national network of wireless locationsystems, based on the company's proprietary RadioCamera(TM) system, U.S.Wireless will enable wireless carriers and others to offer a rich blend oflocation-enhanced services including life-saving 911 caller pinpointing,localized news and traffic updates, enhanced directory assistance, vehicle andasset tracking, and carrier network management services.

U.S. Wireless plans to build and operate its nationwide location service bureauin 100 major markets across the United States, beginning with the Washington,D.C./Baltimore metro area. For more information about U.S. Wireless and itsRadioCamera(TM) network, please visit the Web site at www.uswcorp.com.

NOTE: RadioCamera(TM)is a trademark of U.S. Wireless Corporation.

This press release contains "forward-looking statements" concerning futureexpectations, plans or strategies that involve a number of risks anduncertainties. The Company wishes to caution readers that certain factors mayhave affected the Company's actual results and could cause results forsubsequent periods to differ materially from those expressed in anyforward-looking statement made by or on behalf of the Company. Such factorsinclude, but are not limited to (i) substantial capital requirements andleverage principally as a consequence of its ongoing acquisitions andconstruction activities, (ii) dependence on demand for wireless communications,use of satellites for internet data transmission, and implementation of digitaltelevision, (iii) the success of the Company's tower construction program and(iv) the successful operational integration of the Company's businessacquisitions. The Company undertakes no obligation to update forward-lookingstatements to reflect subsequently occurring events or circumstances

CONTACT: American Tower Corporation Anne Alter (617) 375-7500

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